SORVALL T3 Centrifuge Service Manual
Contents
1. 29 250 c M 29 252 REID cT 20 4 5 3 Refrigeration board RT3 replacement 20 Service Manual 11290099 page 5 of 44 CONTENTS 4 6 ELECTRONIC BOARD REPLACEMENI 30 ZO E Dep o EROR biet a opas 30 62 bb 30 4 7 GAS SPRING REPLACEMENT s Qa ama EN ee EVER ERO 31 4 8 EPROM REPLACEMENTS 32 4 9 ass 32 4 10 REFRIGERATION SYSTEM REPAIRS R T3 33 4 10 1 Refneeraton SYSTEM Eee 33 4 10 2 Condenser components 160126601611 a n Unde uae S oou 34 211 a LT EU 34 Der PART RET UTI 35 5 1 LY Y GCENERAE SCHEMATIC 35 5 2 RTS GENERAL SCHEMA LIU Z I DIR trea e au e duh 36 5 3 MOTORS 37 5 4 LOCK Lasser 38 2 3 ELECIRONIC RACK sg 39 2251 Rack penere 39 MD RR R we RN 39 5 6 FRONT PANEL vr 40 5 7 COOLING UNIT RI I u 41 WIRING DIAGRAMS vv2. 1 Sorvall T3 and Sorvall RT3 operator panel overlay dl V D HI3 Cantrifupe Service Manual 11290099 page 7 of 44 SPECIFICATIONS 1 2 1 DIMENSIONS AND WEIGHT Dimensions H x W x D Packed H x W x D Weight uncrated crated SORVALL T3 43x 58x 69 cm SORVALL T3 58x 78 x 69 cm SORVALL T3 80 kg 91 kg SORVALL RT3 43x 85x 69 cm SORVALL RT3 58x 105 x 69 cm SORVALL RT3 108 kg 121 kg 1 2 2 ELECTRICAL SPECIFICATIONS Mains supply 220 240 VAC 50 Hz Mains supply 120 VAC 60 Hz SORVALL T3 75002385 SORVALL T3 75002386 SORVALL RT3 75002387 SORVALL RT3 75002388 Max power SORVALL T3 1200 W SORVALL 1500 W Average power SORVALL T3 700 W SORVALL RT3 1400 W Refrigeration SORVALL 700 W 1 2 3 PERFORMANCE Max speed Swing out 4000 rpm SORVALL T3 Angle 7800 rpm SORVALL T3 Swing out 4500 rpm SORVALL RT3 Angle 8000 rpm SORVALL RT3 Max RCF Swing out 3800 x g SORVALL T3 Angle 9360 g SORVALL T3 Swing out 4800 x g SORVALL RT3 Angle 9600 g SORVALL RT3 Max capacity Swing out 4 x 750 ml Angle 8 x 100 ml Display High visibility digital display Memory size Program protection Speed Timer Acceleration rates Braking rates Temperature SORVALL RT3 Typical performance Max density Max energy Radius Service Manual 11290099 5 programs direct access Recall key lock
3. ThermoFisher SCIENTIFIC SORVALL Centrifuges SERVICE MANUAL 11290099 CAREFULLY HEAD THIS MANUAL AND THE OPERATING MANUAL BEFORE REPAIRING YOUR INSTRUMENT THIS DOCUMENT IS PROPERTY OF THERMO FISHER SCIENTIFIC it may not be duplicated or distributed without the owner s authorisation The validity of the guarantee is subject to the observation of the instructions and precautions described in this document Service Manual 11290099 page 2 of 44 REVISIONSTATUS INDEX DATE AMENDED PAGES NOTES a 19 02 07 Initial release b 05 07 07 P 40 Modification of cooling system part numbers C 30 01 08 Branding change Service Manual 11290099 page 3 of 44 WARRANTY THERMO FISHER SCIENTIFIC guarantees that this unit Is free from defects in materials and workmanship when it leaves the factory and undertakes to replace or repair the unit if it proves defective in normal use or during service for a period of ONE YEAR from the delivery Our liability under the guarantee is limited to repairing the defective unit or any part of the unit providing it is sent postage paid to an authorized service centre or the SAINT HERBLAIN office This guarantee is invalid if the unit is incorrectly used poorly serviced or neglected mis used or accidentally damaged There is no explicit guarantee other than as stated above For further information assistance or service ThermoFisher SCIENTIFIC Technical Servic
4. SSMS OF AD vada Loco dert eas 16 Li viu rn 16 245 emperaue Sensor RI abo se ec stie tomes se bos D 16 246 ebiserauomconuoblboatd RE 2 cette edes Hic RE 16 2015 es ON 17 DIAGNOSTICS AND REPAIR S asp 1 18 3 1 INTRODUCTION E u uuu aw NS 18 3 2 FUNCTIONAL IEST a tk asawa 18 SA Eprom Iversen 18 ER EE EE ET EE E T 18 1 FAULT CODES SRG IRR EO ERU E I NN E IRI 21 3 3 TROUBLESHOOTING CHAR ID 552052055590 aye eas oe ds 22 3 4 REPEACEMENT PROCEDURES i u u u y ev vota a Sus 24 4 1 MOTOR REPLACEMENTS 24 Ji VENTILATED Modele Tande 24 02 Bendeerated RI 26 4 2 IMBALANCE DETECTOR REPLACEMENIT 27 4 3 REPLACEMENT OF THE LID LOCK ASSEMBL Y 27 4 4 LID LOCK ASSEMBLY ELEMENT REPLACEMENI A 28 441 Lid lock microswitch 28 4 4 2 Lock solenoid microswitch 28 24 5 DENNE NENNE ta us Siaka hias ette 20 4 5 POWER SUPPLY RACK REPLACEMENIIL
5. Remove the rack 4 5 2 REFITTING Carry out the above operation in the reverse order Respect the wiring diagram 4 5 3 REFRIGERATION BOARD REPLACEMENT Dismounting Disconnect the board Remove the board from the rack unscrewing the 2 screws 1 Refitting Carry out the above operations in the reverse order OPTOTRIAC Service Manual 11290099 page 29 of 44 4 6 ELECTRONIC BOARD REPLACEMENT 4 6 1 MICROPROCESSOR POWER PCB Dismounting Remove the front panel Disconnect all cables from the board the board Remove the board Unscrew the 5 screws holding the board in each corner and one in the middle of Refitting insulation sheet between the board and its support 4 6 2 DISPLAY BOARD Dismounting Remove the front panel The board 15 located behind the front panel Disconnect all cables from the board Unscrew the holding nuts and remove the board Refitting Carry out the above operations in the reverse order k 1 r Fan wa YA B Service Manual 11290099 Carry out the above operations In the reverse order and do not forget to place the 4 7 GAS SPRING REPLACEMENT Gas spring replacement Open the lid Open the rear panel Remove the screw located at the bottom of the gas spring Remove the pin which joins the gas spring to the Remove the gas spring Refitting Carry out the above operations in the
6. Range 500 to 8000 rpm Step 10 100 rpm Accuracy 20 Range 30 sec to 99 min hold position Step 30 sec to 1 min 5 5 from 1 tom 5 0 brake cancel coasting from 2000 rpm to 0 rpm Range 9 C to 40 C Step L amp Accuracy 1 5 C 4 C at 4500 rpm 4 x 750ml swing out 1 C at 7800 rpm 30 x 1 5 ml angle 1 5 C 1 2 g cm 30000 J CD2 rotor at 8000 rpm Range 64 to 178 mm Step mm page 8 of 44 1 3 INSTALLATION PROCEDURE IMPORTANT A at least two people are required to lift the centrifuge from the palette and place it on the bench Incorrect installation will affect safety and equipment performances The machine must be installed In a dust and non corrosive environment 1 The Bench top must be rigid sufficiently strong and levelled 2 300 mm of free space gap must be left on each side of the machine to ensure the proper ventilation The centrifuge could move as a result of rotor imbalance rotor disruption or drive failure To avoid dangerous consequences a safety envelope clearance around the unit must be respected Service Manual 11290099 page 9 of 44 2 THEORY OF OPERATION 2 1 DESCRIPTION The microprocessor system which controls the SORVALL T3 and SORVALL RT3 centrifuges ensures the operation of the following major elements Management of the operating modes Generation of alternating current amplitude and frequency Adjustable components for the motor s
7. Q CA A WO N Service Manual 11290099 page 35 of 44 5 2 RT3 GENERAL SCHEMATIC 86000287 86001434 11250239 26962008 25439072 25437049 85241270 26566011 11250228 85210923 0 I CA A WO N Service Manual 11290099 Breaker for 230 V models Breaker for 120 V models Overlay Sorvall RT3 Gas spring Motor bowl seal Lid bowl seal Lid hinge Rubber foot Lid assembly for SORVALL RT3 Inner plastic Lid for SORVALL RT3 page 36 of 44 5 3 MOTOR 11250241 26007026 85480878 89003554 20904430 Service Manual 11290099 Motor kit includes shock absorbers Shock absorber 1 piece Imbalance detector Speed sensor Collect chuck page 37 of 44 5 4 LOCK 89002889 89000309 26487030 26461053 86001406 Service Manual 11290099 Complete lock Lid solenoid without switch Micro switch without lever Flat lever Safety micro switch page 38 of 44 5 5 ELECTRONIC RACK 5 5 1 RACK 8900289 11250225 86004585 26387034 86004803 86001432 82481427 5 5 2 RACK RT3 89002893 11250226 86004585 26387034 86004803 26001432 89002899 85481426 Service Manual 11290099 89002892 11250225 86004586 26387045 39903078 86004598 86001432 85481431 89002894 11250226 86004586 26387045 39903078 86004598 26001432 89002899 85481430 Main PCB SORVALL T3 Programmed EPROM Relay Fuse Transformer Power bridge Braking resistor Complete
8. erase this message Note if Error 01 has been detected and not cleared as above described the alarm reset is possible only after a safety CLOSE Lid open at start The centrifuge doesn t start if Press any keyboard button to Lid the lid isn t properly closed erase this message Close the lid and press START Lid open in running The rotor will brake to a stop Wait for the centrifuge to stop mode Press any keyboard button to erase this message IMBAL Imbalance The rotor will brake to a stop Wait for the centrifuge to stop Press any keyboard button to erase this message Verify that a balanced load is installed Inspect the rotor and rearrange the tubes or add additional tubes with fluid to balance the rotor Motor Over The rotor will brake to a stop Wait for the centrifuge to stop temperature Press any keyboard button to OR erase this message Lid lock error Wait for motor cooling down Chamber Over The rotor will brake to a stop Wait for the centrifuge to stop Temperature Refrigeration Failure Press any keyboard button to The unit displays this Refrigerated only erase this message code if the measured Verify the operating condition temperature exceeds 50 C at any time during the run Electronic failure All controls are disabled To erase the message turn the power switch off and turn the power switch on Note All error indications can be cleared by turn the power switch off and turn the power sw
9. motor turns freely and without noise or abnormal friction If necessary change the motor 7 Starting impossible AII uP board power bridge broken down Change uP board controls and display are operational Defective start switch Change the keyboard Main relay not energised Adjust lid switches 6 The temperature performances are not correct If the cooling unit runs permanently Adjust the lid Error09 and the bowl temperature is always Call a refrigeration engineer too high look for an air leakage at the lid air tightness or a fluid leakage If the display doesn t correspond to the Change the probe real temperature there is a reading Change the PC board problem 9 Lid unlocked when starting Faulty microswitches Check or change microswitches or during rotation Error 06 Service Manual 11290099 page 23 of 44 4 REPLACEMENT PROCEDURES CAUTION DISCONNECT THE MAINS POWER LEAD TO THE CENTRIFUGE BEFORE ALL REPLACEMENT PROCEDURES Replacement of spare parts and adjustment are done using standard tools by a maintenance engineer specialised in laboratory equipment As a guide a list is given in the appendix If for a particular reason any other tools are required these are clearly specified in the relevant chapter 4 1 MOTOR REPLACEMENT 4 1 1 VENTILATED MODEL T3 Dismounting Remove the front panel 1 by unscrewing the screws and disconnect the power switch the flat cable
10. the display supply and the front panel ground cable Lift the bowl seal and unscrew the three press screws of the chamber Remove the bowl seal 2 Lift and remove the bowl Disconnect the connectors from the motor J14 tacho sensor 14 the imbalance sensor 77 the microprocessor power pcb and the thermoswitch connection Lay the centrifuge on the rear side Remove the grid Unscrew the 3 screws then turn the motor body Fig 2 Turn the engine 1 6 of a turn Remove it Fig 3 Refitting Carry out the above operations in the reverse order WARNING SHOCK ABSORBERS NOT TO BE DRILLED DURING THE REASSEMBLY Service Manual 11290099 page 24 of 44 Fig 3 page 25 of 44 Service Manual 11290099 4 1 2 REFRIGERATED MODEL RT3 Dismounting Remove the front panel by unscrewing the screws and disconnect the power switch the flat cable the display supply and the front panel ground cable Remove the Panduit connector from the motor J14 and from tacho sensor J4 of the motor board see connectors and the thermoswitch connection Remove the seal in the base of the bowl Fig 1 Lay the centrifuge on the rear side Remove the grid Unscrew the 3 screws then turn the motor body Fig 2 Turn the engine 1 6 of a turn Remove it Fig 3 Refitting Carry out the above operations in the reverse order WARNING SHOCK ABSORBERS NOT TO BE DRILLED DURING THE REASSEMBLY
11. 0099 page 33 of 44 4 10 2 CONDENSER COMPONENTS REPLACEMENT Access the refrigeration eroup as described above The condenser is in one block Dismount it lifting and shifting the motor fan block separate the different parts 4 11 MOTOR CHECKING To check the motor electrical circuit integrity continuity between phases has to be checked As there are three wires such a measurement has to be carried out alternately at the terminals of two of them choosing the third one as common The two resistance values obtained refer to two successive phases as the state circuit 15 star configured Check that 1 The two values are identical allowable difference 0 2 2 2 The two values are not lower than 3 5 0 2 3 There is no discontinuity If there 15 no conformity to condition 1 the motor can run erratically If there is no conformity to condition 2 the motor can run irregularity with over heating If there 1s no conformity to condition 3 the motor cannot run Service Manual 11290099 page 34 of 44 ne SPARE PARTS 5 5 1 T3 GENERAL SCHEMATIC 86000287 Breaker for 230 V models 86001434 Breaker for 120 V models 11250238 Overlay Sorvall T3 26962008 Gas spring 25439072 Motor bowl seal 25437049 Lid bowl seal 85241270 Lid hinge 26566011 Rubber foot 11250227 Lid assembly Sorvall T3 85210884 Inner plastic lid GO I
12. ACEMENT Dismounting Disconnect the microswitch Unscrew the mounting bolts 2 and dismount the microswitch Refitting Carry out the above operations in the reverse order Ensure that the microswitch rod does not hit the cam when the lid is open to avoid false alarm 4 42 LOCK SOLENOID MICROSWITCH REPLACEMENT Dismounting Dismount the lock assembly Disconnect the microswitch Unscrew the screw located on the diagonal Keep the screw Refitting Carry out the above operations in the reverse order WARNING THE MICROSWITCH ROD MUST BE SHAPED TO WORK PROPERLY AND TO GIVE A GOOD STROKE TO THE SOLENOID MOBILE CORE Service Manual 11290099 page 28 of 44 4 4 3 SOLENOID REPLACEMENT Dismounting Dismount the lock assembly Disconnect the solenoid by cutting the 2 wires at the level of the sleeves Supporting the solenoid unscrew the screws the back of the lid lock assembly panel Refitting Carry out the above operations in the reverse order Ensure that the stroke of the solenoid mobile core is unimpeded Re solder the 2 wires to the solenoid not forgetting to fit the insulating sleeves Nota Solenoid microswitch and lid lock microswitch replacement can be performed without having to remove the whole lid lock assembly 4 5 POWER SUPPLY RACK REPLACEMENT 4 5 1 DISMOUNTING Remove the front panel Unscrew the screw situated in front of the transformer Remove all electrical connections
13. FICHEURS DISPLAY PCB CARTE MICRO CPU PCB Jr JF 18 Service Manual 11290099 page 44 of 44
14. RUCTURE 2 41 INTRODUCTION The electronic part of the apparatus consists of two boards the microprocessor power pcb where every function 15 located and the user interface pcb with display and LEDs The former 15 located inside the body of the machine the second behind the front panel The electronic imbalance sensor 15 located on the motor stabilizer and allows the detection of excessive imbalance due to the rotor loading 2 42 MICROPROCESSOR POWER PCB On the microprocessor power pcb 3 distinct zones can be identified whose functions are described below Each zone has its own independent power supply Jl E PUE GE LII ZONE 1 This zone includes the microprocessor the EPROM containing the software and the non volatile RAM containing the program parameters The set of components in this zone 15 at the potential of the microprocessor 5 VDC ZONE 2 This zone ensures the conformity of the signal type coming from the different detectors before their arrival at the microcontroller via opto couplers It also monitors the lid lock control and refrigeration group command The power supply for this zone is 12 VDC The different signals coming to this zone are Bowl temperature Signal coming from the imbalance sensor Tacho signal Lid position signal The motor over temperature and the lid solenoid control Service Manual 11290099 page 15 of 44 ZONE 3 WARNING THIS ZONE IS AT MAIN
15. S VOLTAGE This zone isolated from the microprocessor part by opto couplers is the electronic part related to the power in the system This zone includes The 15 VDC power supply for the control electronics for this zone The control circuit of the 6 basic signals of the IGBT module The 3 PWM commands coming from the microcontroller The command of activation of the module of power coming from the micro controller The brake GBT with the command which permits flow through the braking resistor The diode bridge which from the mains charge the capacitor of the continuous bus The relay which controlled by the supply of power then short circuits the resistance of the charge of the capacitors of the continuous bus a few moments after switch on The module of 6 IGBTs and its heat sink which power the motor 2 4 3 IMBALANCE SENSOR As described in the introduction this sensor allows the detection of an excessive imbalance in the rotor loading The device amplifies vibrations due to the imbalance and generates a signal beyond a preset threshold After shaping this signal 1s sent to the microprocessor for the safety devices 2 4 4 TACHO SENSOR The tacho sensor is comprised of an optical sensor which generates two pulses per revolution 2 4 5 TEMPERATURE SENSOR RT3 The sensor is a double thermistor It delivers a signal proportional to the temperature 2 4 00 REFRIGERATION CONTROL BOARD RT3 The board cont
16. Service Manual 11290099 page 26 of 44 4 2 IMBALANCE DETECTOR REPLACEMENT Dismounting Remove the front panel by unscrewing the screws and disconnecting the power switch the flat cable the display supply and the front panel ground cable Remove the rack disconnecting all the electrical connections The sensor is located on the motor stabilizer Unscrew the 2 screws and remove the sensor from the stabilizer Disconnect J4 Refitting Carry out the above operations in the reverse order 4 3 REPLACEMENT OF THE LID LOCK ASSEMBLY Dismounting Open the lid Remove the front panel by unscrewing the screws and disconnecting the power switch the flat cable the display supply and the front panel ground cable Disconnect the Hd lock assembly of the microprocessor power pcb by disconnecting the 18 and 110 connectors Unscrew the 2 nuts the body of the instrument Remove the lid lock assembly Refitting Remount lid lock assembly on the body in alignment with the fixing points and keeping it in position thanks to the nuts Check the correct position of the lock to ensure a convenient lid closing Screw down the nuts to the body of the instrument Reconnect the electrical connectors Remount the front panel Lid solenoid Microswitch 2 microswitch Front face Service Manual 11290099 page 27 of 44 4 4 LID LOCK ASSEMBLY ELEMENT REPLACEMENT 4 4 1 LID LOCK MICROSWITCH REPL
17. e Address North America 1 866 984 3766 Europe Austria 43 1 801 400 Belgium 32 2 482 30 30 Finland 358 9 329 100 France 33 2 28 03 20 00 or 33 1 6918 7777 Germany 49 6184 90 6940 or 49 6103 408 1012 Italy 4 39 02 95059 1 Netherlands 31 76 571 4440 Russia CIS 7 095 225 11 15 Spain Portugal 34 93 223 3154 Switzerland 41 1 454 12 12 UK Ireland 44 870 609 9203 Asia India 91 22 5542 9494 Japan 81 45 453 9220 China 86 21 6865 4588 or 86 10 5850 3588 Other Asian countries 852 2885 4613 Countries not listed 49 6184 90 6940 or 33 2 28 03 20 00 Service Manual 11290099 page 4 of 44 CONTENTS I INTRODUCTION rs 7 1 1 PURPOSE Qo uywasuwa i 7 1 2 PRESENTA E 7 SPECIFICA TIONS tt 8 1 2 Dimensions NNN 8 1 2 2x 1106112156 61100115 Hte OL SA MILI MI SE EE 8 8 O IB O 1 25 95 INSTALLATION PROCEDURE s 9 1 3 THEORY OF OPERATIONS 10 Zils DESCRIPTION GN 10 2 2 COMPONENT LAY OUL arren OI a nt i i in s 10 2 MOTOR CONTROL PRINCIPLE R Su u iE SERE CENE ERR 12 ba NNN NE 12 e Ph bD EEE ER OE EE asus 12 255 POWO OL 13 2 4 ELECTRONICS STRUCTURE sanskrit 15 2 oder ee 15 242 Microprocessor PONCE Und cedet ta 15 DAD
18. ed 3 2 2 TEST MODE This mode 15 accessible by using a combination of keys while the machine 1s setting up at power ON Press on the following two keys at the same time e Acceleration profiles programming key e Braking profiles programming key Service Manual 11290099 page 18 of 44 Test 1 Miscellaneous test 0 0 0 0 0 5 digit display speed read T 1 3 digit display T 1 for Test 1 2 digit display actual temperature Tachometer test Turn the rotor by hand the speed should appear on the 5 digit display Lid solenoid test Press on the key corresponding to program 2 to power and or release the solenoid Resetting of the 5 programs Keep pressing on the key corresponding to program 4 Complete program resetting on RAM Press simultaneously on the A speed programming key and the PULSE key to allow complete resetting of the machine when it 1s next switched on Press START to pass to the next test Press STOP to leave the test mode Test 2 Run linking This test safety used in the factory starts a series of preset runs after having pressed the pulse key C X XS E E Run cycles of the selected program can be run with a one minute pause between each 6 Press A and V to change the number of runs from 1 to 99 Cycles won t start if cycles number is less than 3 During the run when rotating displays are the same as they would be outside the test mode Between two runs 1 min
19. electronic rack Main PCB SORVALL RT3 Programmed EPROM Relay Fuse Transformer Power bridge Braking resistor Cooling control PC board Complete rack SORVALL RT3 E R e page 39 of 44 5 6 FRONT PANEL NN 1 89003600 Display PCB packed L AAW NN MEGAFUGE 11 30 T1 T3 89003601 Display PCB packed MEGAFUGE I IR 30R RTI RT3 1 Service Manual 11290099 page 40 of 44 5 7 COOLING UNIT 89003560 89003562 89003503 89003564 86001274 Service Manual 11290099 89003561 89003562 89003563 89003565 86001274 Compressor Condensor Fan Motor stand without fan Temperature probe assy page 41 of 44 6 WIRING DIAGRAMS 831 113 C4i 120V 120V I WIRING DIAGRAM PLAN DE CABLAGE CL 40 J11 12 CPU PCB J10 CARTE AFFICHE URS DISPLAY PCB CARTE MICRO JA imbalance Service Manual 11290099 page 42 of 44 d dal FF HIHIH DISJONCTEUR BREAKER WIRING DIAGRAM PLAN DE CABLAGE CL40 230 V J11 112 CPU PCB 110 DISPLAY PCB CARTE AFFICHEURS CARTE MICRO JB Imbalance tempe ature probe Service Manual 11290099 page 43 of 44 DISJONCTEUR BREAKER HHH WIRING DIAGRAM PLAN DE CABLAGE 1 401 7 J10 111 2 CARTE AF
20. he amplitude and frequency The pilot frequency must be elevated compared to the frequency of the generated sinusoidal voltage The latter 15 around 400 Hz at 24000 r p m f pilot f sin 10 at max speed In the same way the voltages at points R and S will be sinusoidal between OV and E and dephased by 27 3 between them These 3 voltages are simple voltages varying between OV and E They are partly sinusoidal and partly on a baseline situated at E 2 Thus the O of the sinusoidal voltage corresponds to 50 2o of the cyclic ratio The voltages applied to the rotor phases the compound voltages VR VS VS VT VT VR and will vary between E and E 0 E Thus the voltages with amplitude close to that of the mains are reproduced at the motor terminals Speed synchronisation 15 directly proportional to the frequency of the voltage supplied to the motor Ns fx 60 for a 2pole motor The motor rotates at a speed N below the speed Ns Ns N SLIPPAGE the slippage varies between and 3 90 Ns Service Manual 11290099 page 13 of 44 To vary the speed it 1s necessary to vary NS and thus the frequency of the voltage supplied to the motor The torque characteristics will be translated on the speed axis The supply voltage will vary from O to 4000 r p m in order to keep the U f ratio constant and not saturate the magnetic circuit Vitesse Speed Service Manual 11290099 page 14 of 44 2 4 ELECTRONICS ST
21. itch on Service Manual 11290099 page 21 of 44 3 4 TROUBLESHOOTING CHART Preliminary remark when a default 1s reported first carry out the appropriate functional test then refer to the troubleshooting chart below 1 No control active and no No voltage being applied to the Check mains outlet and power cable indicator lights ON centrifuge Fuses blown Check for short circuits Check the absence of short circuits with an ohm meter mains cable disconnected Reset the circuit breaker replace as required Switching of the line differential Check the insulation between the mains and the earth of the centrifuge Short circuit at the power level Disconnect the mains wires arriving at the uP p c b If there is still a short circuit at this level change the uP board or the capacitor Check connections Short circuit on the 5 V Check the presence of 5V on the mother board with the board disconnected from the display board If 5V is present change the display board If 5V is absent check the resistance between the uP board earth and 5V with ohm meter If the resistance 15 zero change uP board If not zero carry out the following test Absence of low voltage the uP Check the presence of alternating voltages on the board transformer output Faulty display Check the cables connectors linking the uP board to the display card 2 All controls inoperative The Faulty microprocessor board Check
22. peed servo Management of the acceleration and braking profile rates Management of the temperature regulation SORVALL RT3 Management of the safety devices Lid lock Zero speed detection Imbalance detection Motor over temperature detection Management of fault diagnosis 2 2 COMPONENT LAY OUT The input and control devices are located on the front panel and are comprised of a membrane keyboard and three digital displays Everything 1s controlled by a 16 bit microprocessor The control program of the centrifuge 15 stored in an EPROM Data are conveyed into a dynamic RAM and are saved even when the power is down thanks to an internal battery which supplies power Service Manual 11290099 page 10 of 44 page 11 of 44 Service Manual 11290099 2 3 MOTOR CONTROL PRINCIPLE 2 3 1 INTRODUCTION The SORVALL T3 SORVALL RT3 family of centrifuges 15 fitted with an asynchronous 3 phase motor During centrifugation the microprocessor generates a system of sinusoidal 3 phase voltages variable in amplitude and frequencies During the braking phase the energy from the rotating parts is commuted across a resistance 2 3 2 THE MOTOR The motor is comprised of a 3 phase stator and a short circuited rotor When correctly powered the stator creates a magnetic field rotating at the synchronised speed Ns Ns F p F supply frequency P number of pairs of poles of the motor The rotating field generated in
23. reverse order Check the correct operation of the lid Service Manual 11290099 page 31 of 44 4 8 EPROM REPLACEMENT WARNING TO EXTRACT THE EPROM USE A PROPER EXTRACTOR AND NOT ANY TOOL THAT COULD DAMAGE THE EPROM AND ITS SOCKET WARNING DURING THE REPLACEMENT MAINTAIN THE EPROM PARALLEL TO ITS SOCKET Extraction Remove the front panel To replace the EPROM it is not necessary to remove the microprocessor power PCB from its support Extract the EPROM 3 2 22222 2 5 ND Insertion See the adjacent figure WARNING INSERT THE NEW EPROM WITH THE NOTCH TOWARDS THE MICROPRESSOR Execute the necessary calibration as explained in chapter 5 4 9 LID REPLACEMENT Open the lid Extract the pin which binds the gas spring Unscrew the 4 screws which bind the lid to the hinge Remove the lid Service Manual 11290099 page 32 of 44 4 10 REFRIGERATION SYSTEM REPAIRS RT3 4 10 1 REFRIGERATION SYSTEM REPLACEMENT Dismounting Referring to procedure already described and to the following figure Disconnect every cable Remove the lid Remove front panel Remove the rack Remove the body and the rear panel Now the centrifuge walls are separated from the body The refrigeration system remains fixed only to the body Refitting Carry out the above operations in the reverse order Service Manual 1129
24. rols the power signal to the refrigeration group Service Manual 11290099 page 16 of 44 Alim face owards display board STI lim Alim 3 Brae T m fea MF s 4 JIB g IL 1 LEE Motor Contactor 5 it Imbalance n detection m m l R Brake 0 832 mU wm v ET 2 4 7 INPUT OUTPUT Tachy hall Switch electro Switch lock Diodes version 120V 9 gt En 9 Termal probe Temp motor Alim 24 Electro Sector power page 17 of 44 Service Manual 11290099 3 DIAGNOSTICS AND REPAIRS 3 1 INTRODUCTION The SORVALL T3 and SORVALL RT3 are equipped with a diagnostic menu in order to help locate possible breakdowns The possible conditions of malfunction are communicated to the user by means of error codes on the display and buzzer alarms 3 2 FUNCTIONAL TEST Certain functional tests can be done directly using the keyboard and display These tests must only be undertaken by someone qualified to do so They are protected by an access code 3 2 1 EPROM VERSION The first message that appears when the machine is switched on remains active for a few seconds machine set up JSORVALLTS SORVALL RTS Display RPM Display Time 40 or 41 80 or 81 Display Temp Note Display Time the second digit 0 or 1 indicates the position of jumper STI factory select
25. s 42 Service Manual 11290099 page 6 of 44 1 INTRODUCTION 1 1 PURPOSE This manual contains maintenance instructions intended for use by a qualified maintenance or service technician It is organized to provide maintenance personnel with basic data on the theory of operation to assist In troubleshooting Moreover it outlines parts replacement and calibration procedures for putting the centrifuges back into service Should a specific maintenance problem arise which is not covered in this manual please ask the authorized service organization in your area for assistance or contact our sales department THERMO FISHER SCIENTIFIC 10 Rue Duguay Trouin 44807 SAINT HERBLAIN Tel 33 0 2 28 03 20 20 Fax 33 0 2 28 03 20 10 2 PRESENTATION The T3 RT3 refrigerated centrifuges are instruments designed for laboratory use Using relative centrifuge force RCF allows elements of different density to be separated The rotor 15 the main load a swing out design allows a higher load than does an angle design The larger the rotor diameter 15 the higher the load can be and thus the slower the speed will be The RCF is directly proportional to the radius of sedimentation and to the square of the speed The gas used in the refrigeration system RT3 15 R130a without recommended by the applicable directive for protection of the ozone layer GB Sy Thermo SANN SN 1
26. the cables connectors to the display display 15 lit up without Check the correct positioning information of the EPROM on the uP board of the microprocessor on the uP board 3 Compressor test incorrect Control fault Check the voltage applied to the compressor RT3 terminals If not apparent or if incorrect change the control board If no effect change the mother board If correct 230 or 120 V according to the version change the condenser and or the Faulty compressor or its compressor start up relay If no effect the accessories compressor coils Service Manual 11290099 page 22 of 44 4 Error 08 Control fault Check the voltage appled to the solenoid terminals If not apparent or Incorrect far Lid lock solenoid test Incorrect from 24 VDO change the mother board or the transformer Faulty solenoid If the voltage is correct change the solenoid Faulty lock solenoid microswitch Check adjust or replace the microswitch which detects the solenoid position Motor Overtemperature Faulty Thermo switch Wait the motor to cool down and check the continuity of the sensor Check motor sce section 4 12 5 Tacho test incorrect Faulty tacho Check the presence of a signal at the input to the mother board with an oscilloscope or DC voltmeter Pulses should appear every 12 sec If absent or incorrect change the tacho 6 Vibrations Failure of the motor bearings Check by hand that the
27. the motor induces e m f s These e m f s produce currents in short circuited rotor These induced currents found in the magnetic field create forces opposed to those which induced them It 15 the relative speed between the rotor and stator which 1s the cause of these induced currents thus the forces will reduce this relative speed by driving the rotor at a speed close to that of the fields created at the stator The difference s between the synchronised speed Ns and the actual speed N of the rotor 1s called the slippage s Ns N Ns At a given frequency the slippage value depends on the resisting torque 1 e that of the rotor T Service Manual 11290099 page 12 of 44 2 3 3 POWER CONTROL It Is necessary to supply from a single phase mains supply 230 V 50 Hz or 120 V 60 Hz three variable tensions with amplitude and with frequency dephased by 2773 The voltage is rectified then filtered by C to supply the constant voltage E The value of the capacitor is high For a 230V 50 Hz mains supply 230 42 325 V C 1000 uF 400 V The 6 transistors act as switches open closed These transistors commute at a fixed frequency 8 kHz To affect the voltage at T we act upon the commands of the transistors a and b b always being the opposite to a a closed b open By changing the cyclic ratio closed open we obtain a mean sinusoidal value so we are able to vary t
28. ute pause displays are C Y C L 0 0 0 Reserved for factory testing Next run number Press START key to go to the following test Press STOP key to exit from the test mode Service Manual 11290099 page 19 of 44 Test 3 Statistical analysis S T A T S Press A and V to scroll on the 5 digit display o running hours total x 100 total number of runs number of hours above 5000 rpm number of runs above 5000 rpm A U Neme Press START key to go back to test 1 Press STOP key to exit from the test mode Service Manual 11290099 page 20 of 44 3 3 FAULT CODES When certain faults are detected an audible alarm 15 switched on in addition to a code and a message Depending on the fault the machine stops automatically under the conditions indicated in the following table Error code Origin State of the centrifuge Usersaction Incorrect speed The rotor will brake to a stop Wait for rotor to stop measurement Lid opening is impossible till Wait for the 4 minutes timeout speed is zero 4 To erase the message open the minutes timeout is expired lid turn the power switch off and turn the power switch on time of 30 minutes Speed gt 0 RPM at The rotor will coast to a stop Wait for rotor to stop power ON Press any keyboard button to erase this message Power was interrupted At power off the rotor will Press any keyboard button to during a run coast to a stop
Download Pdf Manuals
Related Search